用Book 3 Unit1-5的单词或短语的正确形式填空。
【小题1】We are not ____________(允许) to swim in the river. It’s too dangerous.
【小题2】They wrote a letter and ____________（道歉）to their neighbors for their noise.
【小题3】Air pollution will get worse and this will be __________(有害的) to people.
【小题4】____________(显而易见地), fishing forms an actual part of their leisure time.
【小题5】Having a ____________(平衡的) diet is of great importance, especially for teens who are growing up.
【小题6】In fact, music education is ____________(有益的) and important for all students.
【小题7】Columbus Day is meant to celebrate the ___________(到达) of Christopher Columbus.
【小题8】____________(围绕) by mountains and the Pacific Ocean, Vancouver is said to be the most beautiful city in Canada.
【小题9】There was frost on the ground, ___________(证明) that autumn had arrived in Canada.
【小题10】Children’s____________(好奇心)with everything plays an important part in their study.
【小题11】This museum was built ____________(为……纪念) the great writer-Lu Xun.
【小题12】Born into a family with three brothers, David ____________(培养，教育) to value the sense of sharing.
【小题13】They’d like to see their daughter____________(安定下来), get married and have kids.
【小题14】This car industry is thinking of ______________(削减) production because of the COVID-19 pandemic.
【小题15】__________(当心) cars when you cross the road.